$\int \frac{1 + \log x}{x} dx$ का मान ज्ञात करने के लिए,उचित प्रतिस्थापन (substitution) क्या है?

  • A
    $\log x = t$
  • B
    $1 + \log x = t$
  • C
    $\frac{1}{x} = t$
  • D
    इनमें से कोई नहीं

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